CA1287025C - Perimeter safety net system for multi-story buildings under construction - Google Patents
Perimeter safety net system for multi-story buildings under constructionInfo
- Publication number
- CA1287025C CA1287025C CA000557507A CA557507A CA1287025C CA 1287025 C CA1287025 C CA 1287025C CA 000557507 A CA000557507 A CA 000557507A CA 557507 A CA557507 A CA 557507A CA 1287025 C CA1287025 C CA 1287025C
- Authority
- CA
- Canada
- Prior art keywords
- slide rails
- safety net
- building
- slide rail
- net system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/32—Safety or protective measures for persons during the construction of buildings
- E04G21/3261—Safety-nets; Safety mattresses; Arrangements on buildings for connecting safety-lines
- E04G21/3266—Safety nets
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
Abstract of the Disclosure A safety system for a multi-story building under construction includes parallel, vertical, stationary guide channels or tracks secured to the side of the building. Vertically movable slide rails are slidably mounted within the guide channels. Cantilever struts extend diagonally upwardly and outwardly from connections with the slide rails. A safety net extends along the building with its outer edge anchored at the outer ends of the struts and with its inner edge anchored on the movable slide rails. Vertical chains or cables are connected between the slide rails and a construction crane at the top of the building to lift the slide rails and net while in an extended condition to a new working position. Brakes acting between the slide rails and guide channels automatically release to enable upward movement and automatically lock to hold the net in the new working position.
Description
~o~
Perimeter Safe_y Net System for Multi-Stor~ Buildings Under Construction The invention concerns a safety nPt system for multi-story buildings under construction.
In construction of multi-story buildings, thexe is a double hazard that workers may fall causing severe injury or death to themselves, and tools and equipment may fall causing injury o.r death to people below.
To prevent such accidents, some safety standards require nets ~o be installed along the perimeter of the building just below the level of work being performed, but in no event should the dropping distance exceed about twenty five feet. As floors are added in a building under construction, the net is raised.
~One form of safety net system which is widely used is shown in U. S. Patent No. 3,949,834 ent.itled "Safety Net and Adjustable Support Therefor". While this is effective from a safety standpoint, it:has a serious drawback in that lifting the net from one floo~
to the next requires that it be disassembled at the one floor, and the components moved to the next floor and reassembled there. This is time-consuming, takes workers away from their duties, and interferes with constructlon.
For a fifty-story bullding, this may have to be done up to fifty times.
There is a need for such a safety net system 7~
which can be lifted from one floor to the next in a minimum of time and minimum delay oE the work in progress.
The general object of this invention is to provide a safety net system for the perlmeter of a multi-story building under construction.
Accordingly, the presen~ invention provides a safety net system for multi-story buildings under construction, comprising: at least two parallel, vertical, stationary guide channels secured to a side of the building; a vertically movable slide rail slidably mounted on each of said guide channels; a cantilever strut extending diagonally upwardly and outwardly from a connection with each slide rail; outer lS anchor means mounted at the outer end of each strut;
inner anchor means mounted on each slide rail above said connection; a safety net supported between said inner and outer anchor means; and hoist means attached to each of said slide rails to simultaneously lift said slide rails and raise said net while in an extended condition to a new working position.
An advant~ge of this invention is that -the safety net system can be moved upwardly from floor to floor as construction of the building progresses, without dismantling and re-assembling it. The system can be moved upwardly from floor to floor in fully extended condition and be ready for use immediately. The system is readily retractable flatwise against the building to provide clearance for construction equipment and supplies being hoisted alongside-the building. Further, the outer edge is raisable so that debris, which may fall into the net, can be easily removed.
In the accompanying drawings:
Figure 1 is a perspective view of a safety net system and adjustable support therefor illustrating a preferred form of the present invention;
~2~7~2~ii Fi~ure 2 is a fragmentary enlarged side view, partially in cross-section, of Figure l;
Figure 3 is a fragmentary enlarged view of Figure 2 taken in -the direction of arrows 3-3;
Figure 4 is an enlarged cross-section of Figure 3 taken along line 4~4;
Figure 5 is a fragmentary enlarged view of Figure 2 taken in the direction of arrows 5-5;
Figure 6 is a fragmentary enlarged view oE
Figure 5;
Figure 7 is a fragmentary enlarged cross-section of Figure 1 taken along line 7-7; and Figures 8 and 9 are separate illustrations of the suite channel and slide rail respectively.
Referring now more specifically to the embodiment of the invention illustrated in the drawing, the safety net system comprises a plurality of nets 20, 20A and 20B supported along the periphery of a multi-story building 22 under construction. A construction crane 24 has a hoisting cable 26 for lifting construction equipment and supplies in the usual manner. It also lifts the individual safety nets from floor to floor as will be described.
The nets 20, 20A and 20B and their supports may be identlcal. Net 20 will be described with the understanding that it is representative.
Each net comprises a piece of netting fabric 28, having reinforced reinforcing ropes or cables 30 and 40 along the inner and outer edges respectively. The rope or cable 40 is fast-ened by any suitable means such as eye-bolts 41.
The net may be any suitable length depending on the lifting capacity of the crane, height of the building, wind conditions at the site, among other factors. In the present case, net 20 extends the distance of three spans between columns 42.
~21~ 2S
a~
A vertical guide channel 44, best shown in Figures 4 and 8, is secuxed to each column 42. Each guide channel comprises a back web 46, side webs 48, and inwardly extending flanges 50 with a slot 52 between them. A palr of mounting plates 54 are fastened as by welding at 56 across each back web 46. Each mounting plate 54 has a pair of elongated bolt holes 58. Each mounting plate has a corresponding clamping plate 70 on the back side of column 42. Each clamping plate 70 also has a pair of elongated bolt holes 72. As best shown in Figure 4, each guide channel 44 is secured to one of the columns 42 by bolts 74 which extend through bolt holes 58, 72 in plates 54 and 70 respectively.
A vertically movable slide rail 76, best shown in Figures 4 and 9, is slidably mounted within each guide channel 44. As shown in Figure 9, this has a hollow, rectangular box beam cross-section. At the upper end section, each has an eye 78 extending outwardly through the slot 52 and acting as an anchor for the inner reinforcing rope 30. This rope is connected to the inner edge of the netting fabric material by clamps 80.
As best shown in Figures 5 and 6, brake means 81 is provided at the upper end portion of the slide rail 76. It comprises a pair of brake shoes 82 engayeable with the side webs 48. These brake shoes extend through side openings 83 in the slide rail and are pivotally connected to a center boss 79 by links 84. A compression spring 85 bears outwardly on pads 86 on these links thereby biasing the brak-e shoes into frictional enyagement with the guide channel side webs 48.
The weight of the slide rail and net tends to spread the links 84 and increase the frictional contact.
Upward movement, as by pull exerted by chains 94, tends to contract the links 84 and release the frictional contact so the slide rails and net can be lifted without ~2~7~ 5 brake resistance. Thus, the brake means is automatically self-locking in a downward direction and automati.cally self-releasing in an upward direction.
As shown in Figures l and 7, at the column 42 which is common to nets 20 and 20A, there will be a pair of guide channels 44 and 44A. These will be identical as described above for channel 44 and associated parts, except that the components associated with guide channels 44A are identified by the same numerals with the suffix "A". A group of four guide channels 44A and associated components will support an adjacent net 20A
as a continuation of net 20.
The guide channels 44 may be in lengths of, say, twenty feet or so, to extend over two stories.
As the slide rails 76 move upwardly far enough to clear a lower set of guide channels 44, they may be removed and reinstalled higher as upper con-tinuations of the guide channels engaging the slide rails 76. Thus, only two guide channels 44, each spanning about two stories, may suffice for each column 42. Alternatively, as where construction work or major rehabilitation is being done on an existing building~ or the building is relatively low, a single guide channel 44 may be secured to each column 42.
In the usual operation, the net or nets will be assembled around the outside of a buildiny. They will be substantially horizontal and upwardly concave as shown in Figures l and 2. When it is necessary to hoist construction materials and supplies close to the building, a particular net or net section which would be in the way is pulled inwardly by ropes 87 (Figure 2?, flatwise alongside the building, against the bias of torsion springs 114. This retracted position is shown in broken lines in Figure 2 At its extreme top end, each slide rail 76 has an eye 90 for a lifting hook 92 at the end of holsting chain 94. The Eour chains 9~ are connected to a cross-bar or yoks 96 which is connected b~ cables 98A-98D to a hook 99 at the end of hoisting cable 26.
As best shown in Figures 3, ~ and 9, each slide rail 76 has a pair of horizontally spaced, vertical plate members 100 extending forwardly through the slot 52. These plate members have horizontally aligned holes 102 through which a pivot pin 104 extends.
A cantilever strut 106 has a pivotal connection, generally designated 108, with the lower end of each slide rail 76. As best shown in Figure 4, this connection includes a pin 104 which extends through a transverse bore 110 in the strut. A key 112 fastens the pin to the strut and causes it to rotate therewith. A torsion 15 spring 114 has one end 116 engaged with an opening in one of the plate members 110 and its opposite end 118 engaged with an opening in the pin. The spring biases the strut outwardly in the direction of arrow 120 shown in Figure 2.
As new floors are added, the nets will be raised by connecting the crane hook 99 to the ropes 98A-98D and lifting the respective slide rails 76 simultaneously. During this raising maneuver, the nets will be in their outward extended positions as shown in Figure 2 and ready for use immediately. At the net of the construction, when the building is topped out, the netting fabric, guide channels, slide rails and other components will be drawn up to the top oE the building, bundled into compact packages, and lowered to the ground with the crane for use on the next job.
It will be apparent that the embodiment shown is exemp].ary only and that various modifications can be made in construction and arrangement within the scope of the inven-tion as defined in the appended claims.
For example, where the building frame is concrete instead of steel as illustrated, means for securing the guide channels 44 to concrete floor structures may be substituted for the steel column mounting and clamping plates 54 and 70 described.
Perimeter Safe_y Net System for Multi-Stor~ Buildings Under Construction The invention concerns a safety nPt system for multi-story buildings under construction.
In construction of multi-story buildings, thexe is a double hazard that workers may fall causing severe injury or death to themselves, and tools and equipment may fall causing injury o.r death to people below.
To prevent such accidents, some safety standards require nets ~o be installed along the perimeter of the building just below the level of work being performed, but in no event should the dropping distance exceed about twenty five feet. As floors are added in a building under construction, the net is raised.
~One form of safety net system which is widely used is shown in U. S. Patent No. 3,949,834 ent.itled "Safety Net and Adjustable Support Therefor". While this is effective from a safety standpoint, it:has a serious drawback in that lifting the net from one floo~
to the next requires that it be disassembled at the one floor, and the components moved to the next floor and reassembled there. This is time-consuming, takes workers away from their duties, and interferes with constructlon.
For a fifty-story bullding, this may have to be done up to fifty times.
There is a need for such a safety net system 7~
which can be lifted from one floor to the next in a minimum of time and minimum delay oE the work in progress.
The general object of this invention is to provide a safety net system for the perlmeter of a multi-story building under construction.
Accordingly, the presen~ invention provides a safety net system for multi-story buildings under construction, comprising: at least two parallel, vertical, stationary guide channels secured to a side of the building; a vertically movable slide rail slidably mounted on each of said guide channels; a cantilever strut extending diagonally upwardly and outwardly from a connection with each slide rail; outer lS anchor means mounted at the outer end of each strut;
inner anchor means mounted on each slide rail above said connection; a safety net supported between said inner and outer anchor means; and hoist means attached to each of said slide rails to simultaneously lift said slide rails and raise said net while in an extended condition to a new working position.
An advant~ge of this invention is that -the safety net system can be moved upwardly from floor to floor as construction of the building progresses, without dismantling and re-assembling it. The system can be moved upwardly from floor to floor in fully extended condition and be ready for use immediately. The system is readily retractable flatwise against the building to provide clearance for construction equipment and supplies being hoisted alongside-the building. Further, the outer edge is raisable so that debris, which may fall into the net, can be easily removed.
In the accompanying drawings:
Figure 1 is a perspective view of a safety net system and adjustable support therefor illustrating a preferred form of the present invention;
~2~7~2~ii Fi~ure 2 is a fragmentary enlarged side view, partially in cross-section, of Figure l;
Figure 3 is a fragmentary enlarged view of Figure 2 taken in -the direction of arrows 3-3;
Figure 4 is an enlarged cross-section of Figure 3 taken along line 4~4;
Figure 5 is a fragmentary enlarged view of Figure 2 taken in the direction of arrows 5-5;
Figure 6 is a fragmentary enlarged view oE
Figure 5;
Figure 7 is a fragmentary enlarged cross-section of Figure 1 taken along line 7-7; and Figures 8 and 9 are separate illustrations of the suite channel and slide rail respectively.
Referring now more specifically to the embodiment of the invention illustrated in the drawing, the safety net system comprises a plurality of nets 20, 20A and 20B supported along the periphery of a multi-story building 22 under construction. A construction crane 24 has a hoisting cable 26 for lifting construction equipment and supplies in the usual manner. It also lifts the individual safety nets from floor to floor as will be described.
The nets 20, 20A and 20B and their supports may be identlcal. Net 20 will be described with the understanding that it is representative.
Each net comprises a piece of netting fabric 28, having reinforced reinforcing ropes or cables 30 and 40 along the inner and outer edges respectively. The rope or cable 40 is fast-ened by any suitable means such as eye-bolts 41.
The net may be any suitable length depending on the lifting capacity of the crane, height of the building, wind conditions at the site, among other factors. In the present case, net 20 extends the distance of three spans between columns 42.
~21~ 2S
a~
A vertical guide channel 44, best shown in Figures 4 and 8, is secuxed to each column 42. Each guide channel comprises a back web 46, side webs 48, and inwardly extending flanges 50 with a slot 52 between them. A palr of mounting plates 54 are fastened as by welding at 56 across each back web 46. Each mounting plate 54 has a pair of elongated bolt holes 58. Each mounting plate has a corresponding clamping plate 70 on the back side of column 42. Each clamping plate 70 also has a pair of elongated bolt holes 72. As best shown in Figure 4, each guide channel 44 is secured to one of the columns 42 by bolts 74 which extend through bolt holes 58, 72 in plates 54 and 70 respectively.
A vertically movable slide rail 76, best shown in Figures 4 and 9, is slidably mounted within each guide channel 44. As shown in Figure 9, this has a hollow, rectangular box beam cross-section. At the upper end section, each has an eye 78 extending outwardly through the slot 52 and acting as an anchor for the inner reinforcing rope 30. This rope is connected to the inner edge of the netting fabric material by clamps 80.
As best shown in Figures 5 and 6, brake means 81 is provided at the upper end portion of the slide rail 76. It comprises a pair of brake shoes 82 engayeable with the side webs 48. These brake shoes extend through side openings 83 in the slide rail and are pivotally connected to a center boss 79 by links 84. A compression spring 85 bears outwardly on pads 86 on these links thereby biasing the brak-e shoes into frictional enyagement with the guide channel side webs 48.
The weight of the slide rail and net tends to spread the links 84 and increase the frictional contact.
Upward movement, as by pull exerted by chains 94, tends to contract the links 84 and release the frictional contact so the slide rails and net can be lifted without ~2~7~ 5 brake resistance. Thus, the brake means is automatically self-locking in a downward direction and automati.cally self-releasing in an upward direction.
As shown in Figures l and 7, at the column 42 which is common to nets 20 and 20A, there will be a pair of guide channels 44 and 44A. These will be identical as described above for channel 44 and associated parts, except that the components associated with guide channels 44A are identified by the same numerals with the suffix "A". A group of four guide channels 44A and associated components will support an adjacent net 20A
as a continuation of net 20.
The guide channels 44 may be in lengths of, say, twenty feet or so, to extend over two stories.
As the slide rails 76 move upwardly far enough to clear a lower set of guide channels 44, they may be removed and reinstalled higher as upper con-tinuations of the guide channels engaging the slide rails 76. Thus, only two guide channels 44, each spanning about two stories, may suffice for each column 42. Alternatively, as where construction work or major rehabilitation is being done on an existing building~ or the building is relatively low, a single guide channel 44 may be secured to each column 42.
In the usual operation, the net or nets will be assembled around the outside of a buildiny. They will be substantially horizontal and upwardly concave as shown in Figures l and 2. When it is necessary to hoist construction materials and supplies close to the building, a particular net or net section which would be in the way is pulled inwardly by ropes 87 (Figure 2?, flatwise alongside the building, against the bias of torsion springs 114. This retracted position is shown in broken lines in Figure 2 At its extreme top end, each slide rail 76 has an eye 90 for a lifting hook 92 at the end of holsting chain 94. The Eour chains 9~ are connected to a cross-bar or yoks 96 which is connected b~ cables 98A-98D to a hook 99 at the end of hoisting cable 26.
As best shown in Figures 3, ~ and 9, each slide rail 76 has a pair of horizontally spaced, vertical plate members 100 extending forwardly through the slot 52. These plate members have horizontally aligned holes 102 through which a pivot pin 104 extends.
A cantilever strut 106 has a pivotal connection, generally designated 108, with the lower end of each slide rail 76. As best shown in Figure 4, this connection includes a pin 104 which extends through a transverse bore 110 in the strut. A key 112 fastens the pin to the strut and causes it to rotate therewith. A torsion 15 spring 114 has one end 116 engaged with an opening in one of the plate members 110 and its opposite end 118 engaged with an opening in the pin. The spring biases the strut outwardly in the direction of arrow 120 shown in Figure 2.
As new floors are added, the nets will be raised by connecting the crane hook 99 to the ropes 98A-98D and lifting the respective slide rails 76 simultaneously. During this raising maneuver, the nets will be in their outward extended positions as shown in Figure 2 and ready for use immediately. At the net of the construction, when the building is topped out, the netting fabric, guide channels, slide rails and other components will be drawn up to the top oE the building, bundled into compact packages, and lowered to the ground with the crane for use on the next job.
It will be apparent that the embodiment shown is exemp].ary only and that various modifications can be made in construction and arrangement within the scope of the inven-tion as defined in the appended claims.
For example, where the building frame is concrete instead of steel as illustrated, means for securing the guide channels 44 to concrete floor structures may be substituted for the steel column mounting and clamping plates 54 and 70 described.
Claims (8)
1. A safety net system for multi-story buildings under construction, comprising: at least two parallel, vertical, stationary guide channels secured to a side of the building; a vertically movable slide rail slidably mounted on each of said guide channels; a cantilever strut extending diagonally upwardly and outwardly from a connection with each slide rail; outer anchor means mounted at the outer end of each strut;
inner anchor means mounted on each slide rail above said connection; a safety net supported between said inner and outer anchor means; and hoist means attached to each of said slide rails to simultaneously lift said slide rails and raise said net while in an extended condition to a new working position.
inner anchor means mounted on each slide rail above said connection; a safety net supported between said inner and outer anchor means; and hoist means attached to each of said slide rails to simultaneously lift said slide rails and raise said net while in an extended condition to a new working position.
2. A safety net system according to claim 1, having a pivotal connection between each strut and its corresponding slide rail, thereby enabling the net to be retracted to an out-of-the-way position against the building to clear construction materials and the like being hoisted alongside the building.
3. A safety net system according to claim 2, in which each said pivotal connection includes spring means biasing the corresponding strut toward an outward, extended position.
4. A safety net system according to claim 1, including brake means acting between each slide rail and the corresponding guide channel, means automatically responsive to lifting force applied by said hoist means to said slide rails to render said brake means ineffective and enable raising the net, and means automatically responsive to release of said lifting force to render the brake means effective and thereby hold the net at a predetermined level.
5. A safety net system according to claim 4, in which the brake means comprises a pair of brake shoes carried by each slide rail, said shoes being engageable with opposite side walls of the corresponding guide channel, biasing means biasing said brake shoes into braking engagement with the guide channel side walls, and means responsive to upward movement of said slide rails to release said brake means.
6. A safety net system according to claim 5, in which said biasing means is spring means.
7. A safety net system according to claim 1, in which each guide channel comprises a hollow box beam construction with an open slot in one side, said slide rail comprises a box beam construction slidably received within said guide channel, and having said connection with the cantilever strut, and another connection with the inner anchor means, extending through said open slot.
8. A safety net system according to claim 1, in which said hoist means includes a horizontal cross-bar extending across the top ends of the slide rails and are connected thereto by cable-like elements, and a crane at the top of the building is connected to lift said cross-bar, raise said slide rails, and elevate said safety net.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/093,959 US4732234A (en) | 1987-09-08 | 1987-09-08 | Perimeter safety net system for multi-story buildings under construction |
| US093,959 | 1987-09-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1287025C true CA1287025C (en) | 1991-07-30 |
Family
ID=22241928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000557507A Expired - Lifetime CA1287025C (en) | 1987-09-08 | 1988-01-27 | Perimeter safety net system for multi-story buildings under construction |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4732234A (en) |
| CA (1) | CA1287025C (en) |
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| US4928929A (en) * | 1988-02-05 | 1990-05-29 | Jay Kinder | Construction safety netting |
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| US4854419A (en) * | 1988-12-19 | 1989-08-08 | Lyras Louis G | Particulate containment control method and platform device |
| US4892169A (en) * | 1989-02-21 | 1990-01-09 | Sinco, Inc. | Perimeter debris net lifting system |
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| US4982813A (en) * | 1990-06-08 | 1991-01-08 | Sinco, Incorporated | Shock absorbing safety net |
| US5083636A (en) * | 1990-10-09 | 1992-01-28 | The Safe Catch Net Co. | Climbing safety net |
| US5161641A (en) * | 1991-10-29 | 1992-11-10 | Arthur Nusbaum | Jointly movable safety net and curtain arrangement for multi-floor buildings under construction |
| US5429206A (en) * | 1992-08-20 | 1995-07-04 | Nussel, Inc. | Safety net arrangement for elevated structures and method |
| US5426907A (en) * | 1993-07-01 | 1995-06-27 | Franklin; James W. | Construction crane base |
| US6035967A (en) * | 1995-11-01 | 2000-03-14 | Maeda; Hiroshi | Safety apparatus using parallel line catchers for elevated work site operations |
| US6904720B1 (en) | 2000-10-25 | 2005-06-14 | Adolfson & Peterson, Inc. | Construction enclosure system |
| KR100414390B1 (en) * | 2000-11-02 | 2004-01-13 | (주)유원 세이프티 | Supporting device for falling thing preventing net |
| US20060090961A1 (en) * | 2004-11-02 | 2006-05-04 | John Rexroad | Safety net system |
| US20060214150A1 (en) * | 2005-03-04 | 2006-09-28 | Chris Cockerell | Safety net mounting assembly for a single floor of multi-story building |
| US7258198B2 (en) * | 2005-03-24 | 2007-08-21 | John Rexroad | Perimeter net system with support arm lock |
| US7389855B2 (en) * | 2005-03-24 | 2008-06-24 | John Rexroad | Free standing perimeter net system |
| DE102006055374B3 (en) * | 2006-11-23 | 2008-07-10 | Doka Industrie Gmbh | Climbing or guide shoe of a climbing system in construction and climbing system with such a climbing or guide shoe |
| US8376086B1 (en) | 2010-08-17 | 2013-02-19 | Rosalina R. Moyer | Safety net |
| CN102359284B (en) * | 2011-08-16 | 2013-05-01 | 中建三局第二建设工程有限责任公司 | Spliced safety protection net and horizontal blanket net |
| US20130263549A1 (en) * | 2012-04-04 | 2013-10-10 | Helmark Steel, Inc. | Safety screen system for steel erection work |
| US9038777B2 (en) * | 2012-10-15 | 2015-05-26 | James F. Stearns Company LLP | Fall protection system |
| US10006203B2 (en) * | 2015-12-28 | 2018-06-26 | Alejandro Cortina Cordero | Cables lift system for vertical pre-stressing |
| US20170298641A1 (en) * | 2016-04-15 | 2017-10-19 | Pucuda, Inc. | Netting Structure |
| EP3469168B1 (en) * | 2016-09-16 | 2023-11-22 | Diva Investments Pty Ltd as Trustee for Handrail Holding Trust | Safety rail system |
| US11192764B2 (en) * | 2017-04-24 | 2021-12-07 | MCF Distributing, LLC | Pan assembly for aerial work platform |
| US10676945B2 (en) * | 2017-06-01 | 2020-06-09 | Safety Guys, LLC | Building sheath drop netting system and related methodology |
| USD863692S1 (en) * | 2017-09-08 | 2019-10-15 | Joshua Deadrick | Vertical tower safety net |
| US10988949B2 (en) * | 2017-10-27 | 2021-04-27 | Doka Gmbh | Safety screen and safety screen system |
| US11536039B2 (en) * | 2017-12-08 | 2022-12-27 | Seaway Painting, L.L.C. | Tower apparatus |
| US12012769B2 (en) * | 2018-01-19 | 2024-06-18 | Jonathan Jonny Melic | Safety net and safety net components for multi-storey building construction |
| CN111827695B (en) * | 2020-07-31 | 2021-08-24 | 周玉龙 | Construction device for prefabricated building and construction method thereof |
| CN113279594B (en) * | 2021-06-16 | 2021-11-23 | 中航天建设工程集团有限公司 | Safety hanging net system for building construction |
| US11993942B2 (en) * | 2021-07-15 | 2024-05-28 | Mj Engineering & Design | Safety cable system |
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| US2142651A (en) * | 1937-11-16 | 1939-01-03 | Michelson Max | Scaffolding |
| FR71253E (en) * | 1957-02-21 | 1959-11-02 | Protective device for construction work | |
| US3533487A (en) * | 1969-04-28 | 1970-10-13 | Joseph Nuzzo | Scaffold safety suspension system |
| US3921757A (en) * | 1974-08-06 | 1975-11-25 | Thomas N Kennedy | Building evacuation and rescue apparatus |
| US3949834A (en) * | 1975-03-19 | 1976-04-13 | Arthur Nusbaum | Safety net and adjustable support therefor |
| US4129197A (en) * | 1975-08-13 | 1978-12-12 | Preston John C | Safety-catch scaffolding system |
| US4074791A (en) * | 1976-03-16 | 1978-02-21 | Inman Johnny K | Emergency fire net |
| ES223512Y (en) * | 1976-09-29 | 1977-06-16 | Verdu Mira Vicente | SAVE-FALLS PERFECTED FOR WORK. |
-
1987
- 1987-09-08 US US07/093,959 patent/US4732234A/en not_active Expired - Fee Related
-
1988
- 1988-01-27 CA CA000557507A patent/CA1287025C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4732234A (en) | 1988-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |